JavaScript - Stop Multiple Form Actions Using Javascript

<form style="display: none;" name="num1form" id="num1form" action="">
<input type="image" name="1" id="num1" value="1" src="imgl/img_first_01.png" onclick="document.forms[0].action='javascript:ChangeNum1();'"/>
</form>

onclick="document.forms[0].action='javascript:ChangeNum1();'"

function validateFields() {
	var fieldsToVerify = [
                ["PrincipalInvestigator"], 
		["ContactEmailAddress"],
		["RFAward"],
		["Sponsor"],
		["AwardTitle"], 
		["BudgetStartDate"], 
		["BudgetEndDate"], 
		["SectionII"],
		["ProjectRole"],
		["EmployeeName"], 
		["DatesofAppointment"],
		["EffortonProject"],
		["Date"],
		["PrintName"],
		["Date2"],
		["PrintName2"],
		
	];
	

		var emptyFields = [];
	var notFullFields = [];
	for (var i=0; i<fieldsToVerify.length; i++) {
		var f = this.getField(fieldsToVerify[i][0]);
		if (f==null) {
			console.println(fieldsToVerify[i][0] + " not found.");
			continue;
		}
		if (f.valueAsString=="") {
			emptyFields.push(f.name);
		} else if (fieldsToVerify[i].length>1 && f.valueAsString.length<fieldsToVerify[i][1]) {
			notFullFields.push([f.name,fieldsToVerify[i][1]]);
		}
	}
	
	for (var i in nonRequiredFieldsToVerify) {
		var f = this.getField(nonRequiredFieldsToVerify[i]);
		if (f==null) {
			console.println(nonRequiredFieldsToVerify[i] + " not found.");
			continue;
		}
		if (f.valueAsString!="" && f.valueAsString.length<f.charLimit) {
			notFullFields.push([f.name,f.charLimit]);
		}
	}


 if 
(this.getField("CheckBox1").value=="Yes" || this.getField("CheckBox2").value=="Yes" || this.getField("CheckBox3").value=="Yes" || this.getField("CheckBox4").value=="Yes" || this.getField("CheckBox5").value=="Yes" || this.getField("CheckBox6").value=="Yes" || this.getField("CheckBox7").value=="Yes")

{}

else

app.alert("Select a Checkbox in Section I before printing") 

	if (emptyFields.length==0 && notFullFields.length==0) {
		this.print();
	} else {
		var msg = "";
		if (emptyFields.length>0) {
			msg += "The following fields must be filled-in:\n";
			for (var i in emptyFields)
				msg += emptyFields[i]+"\n";
		}

		if (notFullFields.length>0) {
			if (msg!="") msg+="\n\n";
			msg += "The following fields are not filled-in completely:\n";
			for (var i in notFullFields)
				msg += notFullFields[i][0] + " (required length: " + notFullFields[i][1] + ")\n";
		}
		app.alert(msg,"");
	}
}

	<script type="text/javascript">
	function add_content(filedesc,filepath,whatarget) 
{
    
	var output = "" + filedesc + "</b><br />";
	output += "<object type='application/x-shockwave-flash' data='mp3player.swf'>";
    	output += "<param name='movie' value='mp3player.swf'>";
	output += "<param name='wmode' value='transparent'>";
    	output += "<param name='FlashVars' value='mp3=" + filepath + ">";
    	output += "</object></div>";
		output += "" + whatarget + "";
document.getElementById("" + whatarget + "").innerHTML = output;
}
</script>

<a href="javascript:void;" onclick="javascript:add_content('Hello1','../m_music/omd.mp3','target1');">Omd</a><div id='target1'></div>
<a href="javascript:void;" onclick="javascript:add_content('Hello2','../m_music/blondie.mp3','target2');">blondie</a> <div id='target2'></div>

var slides = [
    [ "abc.jpg", 3000 ],
    [ "xyz.png", 5000 ],
    [ "foo.gif", 1500 ]
];
var curSlide = 0;

function nextSlide( )
{
    document.getElementById("thePicture").src = slides[curSlide][0].src;
    setTimeout( nextSlide, slides[curSlide][1] );
    curSlide = ( curSlide + 1 ) % slides.length;
}

function setUp( )
{
    for ( var s = 0; s < slides.length; ++s )
    {
        var image = new Image();
        image.src = slides[s];
        slides[s] = image;
    }
    nextSlide( );
}

window.onload = setUp;

top.window.moveTo(0, 0);
if (document.all) {
	top.window.resizeTo(screen.availWidth, screen.availHeight);
} else if (document.layers || document.getElementById) {
	if (top.window.outerHeight < screen.availHeight || top.window.outerWidth < screen.availWidth) {
		top.window.outerHeight = screen.availHeight;
		top.window.outerWidth = screen.availWidth;
	}
}
function gcd(a, b) {
	return (b === 0) ? a : gcd(b, a % b);
}
var i = 0;
var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent) || this.searchVersion(navigator.appVersion) 

|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (; i < data.length; i + 1) {
			var dataString = data[i].string, dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {	
				if (dataString.indexOf(data[i].subString) !== -1) {
					return data[i].identity;
				}
			} else if (dataProp) {
				return data[i].identity;
			}
		}
		return data[i].identity;
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index === -1) {
			return parseFloat(dataString.substring(index + this.versionSearchString.length + 1));
		}
	},
	dataBrowser: [
        {    string: navigator.userAgent,
             subString: "Chrome",
             identity: "Chrome"
            },
        {    string: navigator.userAgent,
             subString: "OmniWeb",
             versionSearch: "OmniWeb/",
             identity: "OmniWeb"
            },
        {    string: navigator.vendor,
             subString: "Apple",
             identity: "Safari",
             versionSearch: "Version"
            },
        {    prop: window.opera,
             identity: "Opera"
            },
        {    string: navigator.vendor,
             subString: "iCab",
             identity: "iCab"
            },
        {    string: navigator.vendor,
             subString: "KDE",
             identity: "Konqueror"
            },
        {    string: navigator.userAgent,
             subString: "Firefox",
             identity: "Firefox"
            },
        {    string: navigator.vendor,
             subString: "Camino",
             identity: "Camino"
            },
        {    string: navigator.userAgent,
             subString: "Netscape",
             identity: "Netscape"
            },
        {    string: navigator.userAgent,
             subString: "MSIE",
             identity: "Explorer",
             versionSearch: "MSIE"
            },
        {    string: navigator.userAgent,
             subString: "Gecko",
             identity: "Mozilla",
             versionSearch: "rv"
            },
        {    string: navigator.userAgent,
             subString: "Mozilla",
             identity: "Netscape",
             versionSearch: "Mozilla"
            }
	],
	dataOS : [
		{   string: navigator.platform,
                      subString: "Win",
                      identity: "Windows"
		    },
		{   string: navigator.platform,
                      subString: "Mac",
                      identity: "Mac"
		    },
		{   string: navigator.userAgent,
                      subString: "iPhone",
                      identity: "iPhone/iPod"
	             },
		{   string: navigator.platform,
                      subString: "Linux",
                      identity: "Linux"
		    }
	]
};
var version;
if (dataString.indexOf(dataBrowser.versionSearch) !== -1) {
	version = parseFloat(string.indexOf(dataBrowser.versionSearch), 1);
} else {
	version = parseFloat(string.indexOf(dataBrowser.identity), 1);
}
BrowserDetect.init();
if (dataBrowser.identity === "Chrome") {
	if (version >= 8) {
		document.location.replace("main/index.htm");
	} else if (version >= 3) {
		document.location.replace("meh/index.htm");
	} else {
		document.location.replace("http://www.browserchoice.eu/");
	}
} else if (dataBrowser.identity === "Safari") {
	if (version >= 5) {
		document.location.replace("main/index.htm");
	} else if (version >= 3) {
		document.location.replace("meh/index.htm");
	} else {
		document.location.replace("http://www.browserchoice.eu/");
	}
} else if (dataBrowser.identity === "Opera") {
	document.location.replace("http://www.google.com/");
} else if (dataBrowser.identity === "Firefox") {
	document.location.replace("http://www.google.com/");
} else if (dataBrowser.identity === "Mozilla") {
	document.location.replace("http://www.yahoo.com/");
} else if (dataBrowser.identity === "Explorer") {
	if (version >= 8) {
		document.location.replace("meh/index.htm");
	} else {
		document.location.replace("http://www.browserchoice.eu/");
	}
}

window.addEvent('domready',function(){
	//SAMPLE 8
	var handles8_more = $$('#handles8_more span');
	var nS8 = new noobSlide({
		box: $('box8'),
		interval: 5000,
		autoPlay: true,
		items: $$('#box8 h3'),
		size: 900,
		handles: $$('#handles8 span'),
		handle_event: 'mouseenter',
		addButtons: {
			previous: $('prev8'), 
			play: $('play8'), 
			stop: $('stop8'), 
			playback: $('playback8'), 
			next: $('next8') 
		},
		onWalk: function(currentItem,currentHandle){
			//style for handles
			$$(this.handles,handles8_more).removeClass('active');
			$$(currentHandle,handles8_more[this.currentIndex]).addClass('active');
			//text for "previous" and "next" default buttons
			$('prev8').set('html','<< '+this.items[this.previousIndex].innerHTML);
			$('next8').set('html',this.items[this.nextIndex].innerHTML+' >>');
		}
	});
	//walk to item 0 witouth fx
	nS8.walk(0,false,true);
});

		<div class="slider sample8">
			<p class="buttons" id="handles8">
				<span>Item 1</span><span>Item 2</span><span>Item 3</span><span>Item 4</span><span>Item 5</span>
			</p>
			<div class="mask1">
				<div id="box8">
					<div onMouseOver="nS8.Stop();" onMouseOut="nS8.Play();">
					</div>
				</div>
			</div>
			<p class="buttons">
				<span id="prev8">&lt;&lt; Previous</span> | <span id="next8">Next &gt;&gt;</span>
			</p>

			<p class="buttons">
				<span id="playback8">&lt; Playback</span>
				<span id="stop8">Stop</span>
				<span id="play8">Play &gt;</span>
			</p>
		</div>