function trim(str)
	{
		st=new String(str);
		st1=new String();
		i=0;
		len=st.length;
		while(i<len) 
		{ 
			if((st.charAt(i))!=" ") 
				break;
				i++;
		}
		for(j=i;j<len;j++)
		{
			 st1=st1+st.charAt(j);
		}  
		return(st1.toString());
	}
	
	function mand_check_txtfield(ctrlname,msg)
	{
		
		ctrlobj=eval("document." + ctrlname);
		ctrlobj.value=trim(ctrlobj.value);
		if(ctrlobj.value == "")
		{
			alert(msg);
			ctrlobj.focus();
			return false;
		}
		else
			return true
			
	}

	function mand_check_selbox(ctrlname,msg)
	{
		
		ctrlobj=eval("document." + ctrlname);
		if(ctrlobj[ctrlobj.selectedIndex].value == -1)
		{
			alert(msg);
			ctrlobj.focus();
			return false;
		}
		else
			return true
			
	}
	
	function checkEmail(emailStr) { 
		var checkTLD=0; 
		var knownDomsPat=/ ^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/; 
		var emailPat=/^(.+)@(.+)$/; 
		var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]"; 
		var validChars="\[^\\s" + specialChars + "\]"; 
		var quotedUser="(\"[^\"]*\")"; 
		var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/; 
		var atom=validChars + '+'; 
		var word="(" + atom + "|" + quotedUser + ")"; 
		var userPat=new RegExp("^" + word + "(\\." + word + ")*$"); 
		var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$"); 
		var matchArray=emailStr.match(emailPat); 
		
		if (matchArray==null) { 
			alert("The Email Address Is Invalid"); 
			return false; 
		} 
		var user=matchArray[1]; 
		var domain=matchArray[2]; 
		for (i=0; i<user.length; i++) { 
			if (user.charCodeAt(i)>127) { 
				alert("The Username in Email address Contains Invalid Characters."); 
				return false; 
			} 
		} 
		for (i=0; i<domain.length; i++) { 
			if (domain.charCodeAt(i)>127) { 
				alert("Ths Domain Name in Email address Contains Invalid Characters."); 
				return false; 
			} 
		} 
		if (user.match(userPat)==null) { 
			alert("The Username in Email address Is Invalid."); 
			return false; 
		} 
		var IPArray=domain.match(ipDomainPat); 
		if (IPArray!=null) { 
			for (var i=1;i<=4;i++) { 
				if (IPArray>255) { 
					alert("The Destination IP Address in Email address Is Invalid."); 
					return false; 
				} 
			} 
		return true; 
		} 
		var atomPat=new RegExp("^" + atom + "$"); 
		var domArr=domain.split("."); 
		var len=domArr.length; 
		for (i=0;i<len;i++) { 
			if (domArr[i].search(atomPat)==-1) { 
				alert("The Domain Name in Email address Is Invalid."); 
				return false; 
			} 
		} 
		if (checkTLD && domArr[domArr.length-1].length!=2 && 
			domArr[domArr.length-1].search(knownDomsPat)==-1) { 
			alert("The Domain Name Extension in Email address Is Invalid"); 
			return false; 
		} 
		if (len<2) { 
			alert("The Email Address Is Missing A Hostname."); 
			return false; 
		}
		return true;
}