function checkform(){

for (i=0;i<document.wpsc_checkout_forms.elements.length;i++) {

var f = document.wpsc_checkout_forms.elements[i].value;

  if(i==0){
	if(f=="")
		{
			alert("Plese enter First Name!");
			document.wpsc_checkout_forms.elements[i].focus();
			return false;
		
		}
  
  }
  if(i==1){
	if(f=="")
		{
			alert("Plese enter Last Name!");
			document.wpsc_checkout_forms.elements[i].focus();
			return false;
		
		}
  
  }
   if(i==2){
	if(f=="")
		{
			alert("Plese enter Address!");
			document.wpsc_checkout_forms.elements[i].focus();
			return false;
		
		}
  
  }
  
   if(i==3){
	if(f=="")
		{
			alert("Plese City!");
			document.wpsc_checkout_forms.elements[i].focus();
			return false;
		
		}
  
  }
  
   if(i==6){
	if(f!="")
		{
		
		if(document.wpsc_checkout_forms.elements[4].value=="US"){
			
			if((/^[0-9]{5}$/.test(f))==true){
			
			
			}
			else{
			
				alert("Postal code invalid! please enter");
				document.wpsc_checkout_forms.elements[i].focus();
				return false;
			}
			
			}
		
		
		if(document.wpsc_checkout_forms.elements[4].value=="CA"){
			
			if((/^[0-9-A-Z ]{7}$/.test(f))==true){
			
			
			}
			else{
			
				alert("Postal code invalid! please enter");
				document.wpsc_checkout_forms.elements[i].focus();
				return false;
			}
			
			}
			}
		
		}
		
		
		
		if(i==9){
		
	//alert(document.wpsc_checkout_forms.elements[16].value);
		 if( document.wpsc_checkout_forms.elements[i].checked==true){
		 
			if(document.wpsc_checkout_forms.elements[18].checked==true){
			
				if(document.wpsc_checkout_forms.elements[19].value==""){
				
					alert("Please enter Credit Card Number");
					document.wpsc_checkout_forms.elements[19].focus();
					return false;
				}
				
				if(document.wpsc_checkout_forms.elements[20].value==""){
				
					alert("Please enter month(eg:mm)");
					document.wpsc_checkout_forms.elements[20].focus();
					return false;
				}
				
				if(document.wpsc_checkout_forms.elements[21].value==""){
				
					alert("Please enter year(eg:yy)");
					document.wpsc_checkout_forms.elements[21].focus();
					return false;
				}
				
				if(document.wpsc_checkout_forms.elements[22].value==""){
				
					alert("Please enter CVV");
					document.wpsc_checkout_forms.elements[22].focus();
					return false;
				}
			}
		 
		 }else{
		 
			if(document.wpsc_checkout_forms.elements[11].value==""){
				
					alert("Please enter First Name");
					document.wpsc_checkout_forms.elements[11].focus();
					return false;
				}
		 
		 if(document.wpsc_checkout_forms.elements[12].value==""){
				
					alert("Please enter Last Name");
					document.wpsc_checkout_forms.elements[12].focus();
					return false;
				}
		 
		 
		 
		 
		 if(document.wpsc_checkout_forms.elements[18].value=="authorize" && document.wpsc_checkout_forms.elements[18].checked==true){
			
				if(document.wpsc_checkout_forms.elements[19].value==""){
				
					alert("Please enter Credit Card Number");
					document.wpsc_checkout_forms.elements[19].focus();
					return false;
				}
				
				if(document.wpsc_checkout_forms.elements[20].value==""){
				
					alert("Please enter month(eg:mm)");
					document.wpsc_checkout_forms.elements[20].focus();
					return false;
				}
				
				if(document.wpsc_checkout_forms.elements[21].value==""){
				
					alert("Please enter year(eg:yy)");
					document.wpsc_checkout_forms.elements[21].focus();
					return false;
				}
				
				if(document.wpsc_checkout_forms.elements[22].value==""){
				
					alert("Please enter CVV");
					document.wpsc_checkout_forms.elements[22].focus();
					return false;
				}
			}
		 
		 
		 
		 
		 
		 
		 }
		}
		
		if(i==8){
		
		  if(validate(f)==false){
		   return false;
		  }
		}
  
  }

}

function validate(address) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
  // var address = document.forms[form_id].elements[email].value;
   if(reg.test(address) == false) {
      alert('Invalid Email Address');
      return false;
   }
  // return false;
}