/*var supersleight=function(){var root=false;
	var applyPositioning=true;
	var shim='images/x.gif';
	var shim_pattern=/x\.png$/i;
var fnLoadPngs=function(){if(root){root=document.getElementById(root);}else{root=document;}
for(var i=root.all.length-1,obj=null;(obj=root.all[i]);i--){if(obj.currentStyle.backgroundImage.match(/\.png/i)!==null){bg_fnFixPng(obj);}
if(obj.tagName=='IMG'&&obj.src.match(/\.png$/i)!==null){el_fnFixPng(obj);}
if(applyPositioning&&(obj.tagName=='A'||obj.tagName=='INPUT')&&obj.style.position===''){obj.style.position='relative';}}};var bg_fnFixPng=function(obj){var mode='scale';var bg=obj.currentStyle.backgroundImage;var src=bg.substring(5,bg.length-2);if(obj.currentStyle.backgroundRepeat=='no-repeat'){mode='crop';}
obj.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+src+"', sizingMethod='"+mode+"')";obj.style.backgroundImage='url('+shim+')';};var el_fnFixPng=function(img){var src=img.src;img.style.width=img.width+"px";img.style.height=img.height+"px";img.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+src+"', sizingMethod='scale')";img.src=shim;};var addLoadEvent=function(func){var oldonload=window.onload;if(typeof window.onload!='function'){window.onload=func;}else{window.onload=function(){if(oldonload){oldonload();}
func();};}};return{init:function(){addLoadEvent(fnLoadPngs);},limitTo:function(el){root=el;},run:function(){fnLoadPngs();}};}();supersleight.init();
*/
function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    return false
		 }

		 if (str.indexOf(" ")!=-1){
		    return false
		 }

 		 return true
	}
	
<!--Tag cloud script start-->
$(document).ready(function(){	
	
	// create a style switch button
	var switcher = $('<a href="javascript:void(0)" class="btn">Change appearance</a>').toggle(
		function(){
			$("#tags ul").hide().addClass("alt").fadeIn("fast");
		},
		function(){
			$("#tags ul").hide().removeClass("alt").fadeIn("fast");
		}
	);
 	$('#tags').append(switcher);
	
	// create a sort by alphabet button
	var sortabc = $('<a href="javascript:void(0)" class="btn">Sort alphabetically</a>').toggle(
		function(){
			$("#tags ul li").tsort({order:"asc"});
		},	
		function(){
			$("#tags ul li").tsort({order:"desc"});
		}		
		);
 	$('#tags').append(sortabc);		
	
	// create a sort by alphabet button	
	var sortstrength = $('<a href="javascript:void(0)" class="btn">Sort by strength</a>').toggle(
		function(){
			$("#tags ul li").tsort({order:"desc",attr:"class"});
		},	
		function(){
			$("#tags ul li").tsort({order:"asc",attr:"class"});
		}		
		);
 	$('#tags').append(sortstrength);			
	
});
<!-- Tag cloud tag end-->
	//<![CDATA[

 // If you don't want to put nonstandard properties in your stylesheet, here's yet
 // another means of activating the script. This assumes that you have at least one
 // stylesheet included already in the document above this script.
 // To activate, delete the CSS rules above and uncomment below (remove /* and */ ).

 /*
 if (document.all && /MSIE (5\.5|6)/.test(navigator.userAgent) &&
  document.styleSheets && document.styleSheets[0] && document.styleSheets[0].addRule)
 {
  document.styleSheets[0].addRule('*', 'behavior: url(iepngfix.htc)');
  // Feel free to add rules for specific elements only, as above.
  // You have to call this once for each selector, like so:
  //document.styleSheets[0].addRule('img', 'behavior: url(iepngfix.htc)');
  //document.styleSheets[0].addRule('div', 'behavior: url(iepngfix.htc)');
 }
 */


 // Here's another script that disables all PNGs in IE when the page is printed.
 /*
 if (window.attachEvent  && /MSIE (5\.5|6)/.test(navigator.userAgent))
 {
  function printPNGFix(disable)
  {
   for (var  i = 0; i < document.all.length; i++)
   {
    var e = document.all[i];
    if (e.filters['DXImageTransform.Microsoft.AlphaImageLoader'] || e._png_print)
    {
     if (disable)
     {
      e._png_print = e.style.filter;
      e.style.filter = '';
     }
     else
     {
      e.style.filter = e._png_print;
      e._png_print = '';
     }
    }
   }
  };
  window.attachEvent('onbeforeprint',  function() { printPNGFix(1) });
  window.attachEvent('onafterprint',  function() { printPNGFix(0) });
 }
 */

 //]]>