JavaScript - Regex Not Workin In Ie7 & 6 - But Fine Elsewhere

<div id="header_container">
  <div id="header">
    <div id="header_lh_cell"><a href="http://www.alamomotorsports.com"><img src="http://www.alamomotorsports.com/images/AMSTopper.jpg" alt="Jump to the Alamo Motorsports Homepage" /></a></div>
    <div id="header_center_cell">Orders over $150<br /><span class="bam">Ship Free!</span>*<br />
                                 <img src="http://www.alamomotorsports.com/images/multicard_bk_allt.gif" alt="Alamo Motorsports accepts Visa, Mastercard, and American Express" /></div>
    <div id="header_rh_cell" class="header_footer_links">
      Customer Support:<br />
      <span class="bam">800-880-0960</span><br />
      <form> 
        <input type="button" value="Email Us!" onClick="window.open('/emailus.html','mywindow','width=600,height=500')"> 
      </form>
    </div>

document.writeln("<div id=\"header_container\">  <div id=\"header\">    <div id=\"header_lh_cell\"><a href=\"http://www.alamomotorsports.com\"><img src=\"http://www.alamomotorsports.com/images/AMSTopper.jpg\" alt=\"Jump to the Alamo Motorsports Homepage\" /></a></div>    <div id=\"header_center_cell\">Orders over $150<br /><span class=\"bam\">Ship Free!</span>*<br />                                 <img src=\"http://www.alamomotorsports.com/images/multicard_bk_allt.gif\" alt=\"Alamo Motorsports accepts Visa, Mastercard, and American Express\" /></div>    <div id=\"header_rh_cell\" class=\"header_footer_links\">Customer Support:<br /><span class=\"bam\">800-880-0960</span><br /><form> <input type=\"button\" value=\"Email Us!\" onClick=\"window.open('/emailus.html','mywindow','width=600,height=500')\"> </form></div>    <div id=\"header_menu\">      <ul id=\"category\">        <li><a href=\"http://www.alamomotorsports.com/indexcat.html\">Shop By<br />Category</a></li>      </ul>      <ul id=\"manufacturer\">        <li><a href=\"http://www.alamomotorsports.com/indexman.html\">Shop By<br />Manufacturer</a></li>      </ul>      <ul id=\"info\">        <li><h2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />Info</h2>        <ul>          <li><a href=\"http://www.alamomotorsports.com/contact_info.html\">Contact Us</a></li>          <li><a href=\"http://www.alamomotorsports.com/blowout.html\">Blowout Sale</a></li>          <li><a href=\"http://www.alamomotorsports.com/disclaim_shipping.htm\">Our Policies</a></li>          <li><a href=\"http://www.alamomotorsports.com/links.html\">Links</a></li>          <li><a href=\"http://www.alamomotorsports.com/most_popular.html\">Most Popular</a></li>        </ul>        </li>      </ul>      <ul id=\"showcart\">        <li><a href=\"http://www.cartserver.com/sc/cart.cgi?item=a-2309&amp;view.x=1\">Show My<br />Shopping Cart</a></li>      </ul>      <ul id=\"search\">        <li><form method=\"get\" action=\"http://www.alamomotorsports.com/cgi/search.pl\">                  <h2><label for=\"fdse_TermsEx\" >Search for: </label>                  <input name=\"Terms\" id=\"fdse_TermsEx\" />                  <input type=\"submit\" value=\"Go\"> </h2>                </form>        </li>      </ul>    </div><!--header_menu-->  </div><!--header--></div><!--header_container--><div id=\"content_container\"><div id=\"content\">");

function get(editid) {
// IE
if(document.frames[editid].document) return document.frames[editid].document;
else return document.getElementById(editid).contentDocument;
}

function ini(edit) {
 get(edit).designMode = "On";
}

function xC(edit, cmnd, arg) {
get(edit).execCommand(cmnd, false, arg);
}

var str = 'leading junk http://h71036.www7.hp.com/hho/images/Outdoor_scene.jpg trailing junk';
var txt = str.replace(/^\s?((https?|ssh|ftp|mailto|file|www):\/\/.*?)\s?$/gi,'href:\n1 is $1\n2 is $2\n3 is $3');
alert(txt);

<a href="http://www.mywebsite.com/Promotional.Products-Promotional.Items/Promotional-Products/<?php echo $product_id ?>-<?php echo str_replace(" ", "-", $myTitle) ?>-<?php echo $full_state ?>-Promotional-Products.html" title="<?php echo $myTitle?> <?php echo "$full_state"; ?>"><?php echo $myTitle?></a>


RewriteRule ^Promotional.Products-Promotional.Items/Promotional-Products/([0-9]+)-([a-zA-Z]+)-([a-zA-Z]+)-Promotional-Products.html$ Promotional.Products-Promotional.Items/Promotional-Products.php?product_id=$1&myTitle=$2&full_state=$3

...-([a-zA-Z]+)-...

function IsNewBid() {
    var NewBid = document.getElementById('MainContent_txtNewBid').value;
    var result;
    result = ^[0-9]{1,10}[.]{1}[0-9]{1,2}$|^[0-9]{1,10}$(NewBid .Value)
    if (result 'Equals False So theres and error')
        Do something
    else{
        carry on 
      }
        
}

function captureText(){
	var txt = "";
	if(window.getSelection){
		var text = window.getSelection();
	}
	else if(document.selection){
		var text = document.selection.createRange().text;
	}
	else {
		return;
	}
	if(text != ""){
		var reg = /^[A-Z](.*?)+(\.)$/g;
		var check = text.match(reg);
		alert(check);
		alert("You selected: "+text);
		if(window.getSelection){
			window.getSelection().removeAllRanges();
		}
		else if(document.selection){
			text.blur();
			document.selection.empty();
		}
		else {
			return;
		}
	}
}
document.onmouseup = captureText;

var age = /^[0-9 ]{3,20}$/;   // trying to check age (only 18-25 is valid)

/^[A-Za-z ]{3,50}$/

preg_match('/.{2,60}$/',$address)

function checkZip(){
var re5digit=/^\d{5}$/ //regular expression defining a 5 digit number
if (document.myform.zip.value.search(re5digit)==-1) //if match failed
alert("Please enter a valid 5 digit number inside form")
}

<form name="myform" onsubmit="return checkZip()">
		<fieldset>
		<legend>Test Form</legend>			

		Firstname*: <input type="text" name="firstname"/><br/>
		Lastname*: <input type="text" name="lastname"/><br/>
		Street*: <input type="text" name="street"/><br/>
		City*: <input type="text" name="city"/><br/>
		State*: <input type="text" name="state"/><br/>
		Zip*: <input type="text" name="zip"/><br/>
		Age*: <input type="text" name="age"/><br/>
		Gender*: <input type="text" name="gender"/><br/>
		Major/Program Choice*: <input type="text" name="major"/><br/><br/>
		<input type="reset" /> 
		<input type="submit" />

<b><i><u> </u></i></b>

messageVal = messageVal.replace(/(<[^\/>]*>)+[\s]*(<\/[^>]*>)+/g,'');

<b> hello <u><i> </i></u></b>

<b> hello

<b> hello </b>

/* MY COMMENT */

replace(/\/*(.*)\//g,"");

if (node.nodeType == 3 && ! /\S/.test(node.nodeValue)){
   // code to remove the text node
}

! /\S/.test(node.nodeValue)

/\s/.test(node.nodeValue)

var ermtext = response.match(/<START>(.*?)<END>/i);
    if (ermtext) {
        result.ermtext = ermtext.replace("$1");
    }

var patt=/<START>(.*?)<END>/i;
result.ermtext = response.match(patt, "$1");

if (result.marc.f695.subfields['a'] != "Electronic journals" 		
  && result.marc.f695.subfields['a'] != "electronic journals") {
          return;
}

val = val.replace (/[^0-9\\s\\-\\(\\)\\+]/gi,"");  // strip the characters that cannot appear in a phone number

val = val.replace (/[^0-9\s\-\(\)\+]/gi,"");  // strip the characters that cannot appear in a phone number