var fieldstocheck = new Array(); 

fieldnames = new Array(); 

function checkform() { 

for (i=0;i<fieldstocheck.length;i++) { 

if (eval("document.subscribeform.elements['"+fieldstocheck[i]+"'].value") == "") { 

alert("Please enter your "+fieldnames[i]); 

eval("document.subscribeform.elements['"+fieldstocheck[i]+"'].focus()"); 

return false; 

} 

} 

return true; 

} 

function addFieldToCheck(value,name) { 

fieldstocheck[fieldstocheck.length] = value; 

fieldnames[fieldnames.length] = name; 

}