function validateForm()
{
    if(document.forms[0].name == 'jobapplication') 
    {
	if     (document.jobapplication.elements.first_name.value.length == 0 ) { alert("Please fill in Your first name."); return false;}
	else if(document.jobapplication.elements.last_name.value.length == 0 ) { alert("Please fill in Your last name."); return false;}
	else if(document.jobapplication.elements.Email.value.length == 0 ) { alert("Please fill in Your email address."); return false;}
	else if(document.jobapplication.elements.Email.value.indexOf("@") == -1) {alert("Given email address is not valid.");return false;}
	else if(document.jobapplication.elements.uploadedfile.value.length == 0 ) { alert("Please attach Your resume."); return false;}
    }
    else if(document.forms[0].name == 'contact_form')
    {
	if     (document.contact_form.elements.full_name.value.length == 0 ) { alert("Please fill in Your name."); return false;}
	else if(document.contact_form.elements.Email.value.length == 0 ) { alert("Please fill in Your email address."); return false;}
	else if(document.contact_form.elements.Email.value.indexOf("@") == -1) {alert("Given email address is not valid.");return false;}
	else if(document.contact_form.elements.Comments.value.length == 0 ) { alert("Please fill in comments."); return false;}
    }
    document.forms[0].submit();
}