/************************************************************
 ** Clears a field
 ** By: 	Joshua Sowin (fireandknowledge.org)
 ** HTML: <input type="text" value="Search" name="search"
 **			id="search" size="25" 
 ** 		onFocus="clearInput('search', 'Search')" 
 ** 		onBlur="clearInput('search', 'Search')" />
 ***********************************************************/
function clearInput(field_id, term_to_clear) {
	
	// Clear input if it matches default value
	if (document.getElementById(field_id).value == term_to_clear ) {
		document.getElementById(field_id).value = '';
	}
	
	// If the value is blank, then put back term
	else if (document.getElementById(field_id).value == '' ) {
		document.getElementById(field_id).value = term_to_clear;
	}
} // end clearInput()


/**
 * DHTML email validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
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("Please enter a valid email address.");
		   return false;
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Please enter a valid email address.");
		   return false;
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		   alert("Please enter a valid email address.");
		    return false;
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		   alert("Please enter a valid email address.");
		    return false;
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		   alert("Please enter a valid email address.");
		    return false;
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		   alert("Please enter a valid email address.");
				return false;
		 }
		
		 if (str.indexOf(" ")!=-1){
		   alert("Please enter a valid email address.");
		    return false;
		 }

 		 return true;					
	}

function ValidateForm(){
	var emailID=document.newsletter.email;
	
	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please Enter your Email ID");
		emailID.focus();
		return false;
	}
	if (echeck(emailID.value)==false){
		emailID.value="";
		emailID.focus();
		return false;
	}
	return true;
 }