function trim(str)
{
    if(!str || typeof str != 'string')
        return '';

    return str.replace(/^[\s]+/,'').replace(/[\s]+$/,'').replace(/[\s]{2,}/,' ');
}

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){
	   alert("Invalid E-mail ID")
	   return false
	}

	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   alert("Invalid E-mail ID")
	   return false
	}

	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
	    alert("Invalid E-mail ID")
	    return false
	}

	 if (str.indexOf(at,(lat+1))!=-1){
	    alert("Invalid E-mail ID")
	    return false
	 }

	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
	    alert("Invalid E-mail ID")
	    return false
	 }

	 if (str.indexOf(dot,(lat+2))==-1){
	    alert("Invalid E-mail ID")
	    return false
	 }
	
	 if (str.indexOf(" ")!=-1){
	    alert("Invalid E-mail ID")
	    return false
	 }

		 return true					
}

function checkemail(theform)
{
	if(trim(theform.l_name.value) == '' || theform.l_name.value == null)
	{
		alert("Last Name is required");
		return false;
	}
	
	if(trim(theform.f_name.value) == '' || theform.f_name.value == null)
	{
		alert("First Name is required");
		return false;
	}
	
	if(trim(theform.email.value) == '' || theform.f_name.value == null)
	{
		alert("Email is required");
		return false;
	}
	
	if (echeck(theform.email.value)==false){
		return false
	}
	
	if(trim(theform.phone.value) == '' || theform.phone.value == null)
	{
		alert("Phone is required");
		return false;
	}
	
	if(theform.phone.value.length < 6)
	{
		alert("Phone number must be greater than 6 characters");
		return false;
	}
	
	if(trim(theform.cell.value) == '' || theform.cell.value == null)
	{
		alert("Cell is required");
		return false;
	}
	
	if(theform.cell.value.length < 8)
	{
		alert("Cell must be greater than 8 characters");
		return false;
	}
	
	return true;
}