onkeypress 检测输入的数据

昨天做了个测试onkeypress 检测输入的数据 先记录下

可惜只有IE支持ime-mode:disabled

 

function checkInputNumber(ele,checkType,maxPoint){

ele.onkeypress = function(e){

var e = e || window.event,

charCode = typeof e.charCode == "number" ? e.charCode : e.keyCode;

if(checkType == "voucherNumber"){  //数字

if(!/\d/.test(String.fromCharCode(charCode)) && charCode > 9){

preventDefault(e);

}

}

else if(checkType == "amount"){  //金额  maxPoint为保留的小数位数

if( (!/\d/.test(String.fromCharCode(charCode)) && charCode != 46) || (charCode == 46 && ele.value.indexOf(".") > -1) ||

/\d/.test(String.fromCharCode(charCode)) && ele.value.indexOf(".") > -1 && (ele.value.indexOf(".") + 1 + maxPoint) == ele.value.length && getCursortPosition(ele) > ele.value.indexOf(".")){

if(charCode > 9){

preventDefault(e);

}

}

}

};

ele.onpaste = function(){

preventDefault(e);

}

}

 

function preventDefault(e){

if(e.preventDefault){

e.preventDefault();

}else{

window.event.returnValue = false;

}

}

function getCursortPosition (ele) {//获取光标位置函数

var cursorPos = 0; // IE Support

if (document.selection) {

ele.focus ();

var Sel = document.selection.createRange ();

Sel.moveStart ('character', -ele.value.length);

cursorPos = Sel.text.length;

}

// Firefox support

else if (ele.selectionStart || ele.selectionStart == '0')

cursorPos = ele.selectionStart;

return cursorPos;

}

checkInputNumber(document.getElementById("voucherNumber"),"voucherNumber");

checkInputNumber(document.getElementById("amountId"),"amount",2);