function blockVisibility(id) {
		var elem = document.getElementById(id);
		if (elem && elem.style) {
			elem.style.display = elem.style.display = 'block';
		}
	}

    function inlineVisibility(id) {
		var elem = document.getElementById(id);
		if (elem && elem.style) {
			elem.style.display = elem.style.display = 'inline';
		}
	}

	function noneVisibility(id) {
		var elem = document.getElementById(id);
		if (elem && elem.style) {
			elem.style.display = elem.style.display = 'none';
		}
	}	
			
	function showDiv(divname){
		blockVisibility(divname);	
	}

	function showDivs(indexArray){
		for (i=0;i<indexArray.length;i++){  
			blockVisibility(indexArray[i]);	
		}
	}

	function closeDiv(divname){
		noneVisibility(divname);
	}

	function closeDivs(indexArray){
		for (i=0;i<indexArray.length;i++){  
			noneVisibility(indexArray[i]);
		}
	}
	function checkLength( node, length ){
		if( node.value.length < length ){
			return true;
		}
		node.value = node.value.substring(0, node.value.length - 1);
		return false;
	}