正则限制文本输入

【正则表达式】function regInput(reg) { var srcElem = event.srcElement var oSel = document.selection.createRange() var srcRange = srcElem.createTextRange() oSel.setEndPoint("StartToStart", srcRange) var num = oSel.text + String.fromCharCode(event.keyCode) + srcRange.text.substr(oSel.text.le...