function checklogin(e, type) {
	var characterCode //literal character code will be stored in this variable

	if(e && e.which){ //if which property of event object is supported (NN4)
		e = e
		characterCode = e.which //character code is contained in NN4's which property
	} else {
		e = event
		characterCode = e.keyCode //character code is contained in IE's keyCode property
	}

	if(characterCode == 13){ //if generated character code is equal to ascii 13 (if enter key)
		if(type == 'c') {
			document.forms[0].submit()
		} else if(type == 'o') {
			document.forms[1].submit()
		} else if(type == 'a') {
			document.forms[2].submit()
		}

		return false
	} else {
		return true
	}
}