function HideID(ID)
	{
		document.getElementById(ID).style.display='none';
	}
function ShowID(ID)
	{
		document.getElementById(ID).style.display='';
	}
function DisableID(ID)
	{
		document.getElementById(ID).disabled=true;
	}
function EnableID(ID)
	{
		document.getElementById(ID).disabled=false;
	}
function jump(curId, nextId)
{
	key = window.event.keyCode;
    if(key==8 || key==9 || key==46 || key==37 || key==38 || key==39 || key==40) return true;
	curId_TF = document.getElementById(curId);
    if(nextId!=null && nextId!='')
	nextId_TF = document.getElementById(nextId);
    var TempValue = curId_TF.value;
    if (TempValue.length == curId_TF.getAttribute("maxLength"))
    {
		if(nextId!=null && nextId!='')
			nextId_TF.focus();
    }
}
function jump_back(curId, prevId)
{
	key = window.event.keyCode;
    curId_TF = document.getElementById(curId);
    if(prevId!=null && prevId!='')
		prevId_TF = document.getElementById(prevId);
    var TempValue = curId_TF.value;
//	alert(key);
    if (TempValue.length == 0 && (key==8 || key==46))
    {
        if(prevId!=null && prevId!='') prevId_TF.focus();
    }
}
function alphanumber(){
	var key = window.event.keyCode;
	document.getElementById('aa').value=key;
//	confirm(key);
	if(key==79||key==106||key==107||key==109||key==110||key==111){
		alert('disallowed : \n' + key);
		window.event.keyCode = '';
		return false;
	}else if(key==8||key==9||key==13||key==16||key==17||key==18||key==20||key==27||key==35||key==36||key==37||key==38||key==39||key==40||key==46||key==91||key==116||key==144){
//		alert('allowed : \n' + key);
		return true;
	}else if(key>48 && key<=57){
//		alert('allowed : \n' + key);
		return true;
	}else if(key>64 && key<=90){
//		alert('allowed : \n' + key);
		return true;
	}else if(key>96 && key<=122){
//		alert('allowed : \n' + key);
		return true;
	}else{
		alert('disallowed : \n' + key);
		window.event.keyCode = '';
		return false;
	}
}
function check(prevId, curId, nextId)
{
	jump_back(curId, prevId);
//	alphanumber();
	jump(curId, nextId);
}