function IsNumeric(sText)

{
   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
   
   }
	

var error="";
e_regex = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,})+$/;

function Checkit(theform) {
	
	if(theform.name.value=="") {
		error+="You did not enter your name\n";
	}
	if(theform.tel.value=="") {
		error+="You did not enter your contact number\n";
	}
	if (!IsNumeric(theform.tel.value)) 
   { 
		error+="Please enter only numbers or decimal points in the telephone field\n";
    } 	
	

	
	if(theform.email.value=="") {
		error+="You did not enter your email\n";
	} else if(!e_regex.test(theform.email.value)) {
		error+="Invalid email address\n";
	}
		
	
	

	if(error) {
		alert('**The form returned the following errors:**\n\n' + error);
		error="";
		return false;
	} else {
		return true;
	}
}