js 判断某字符串中是否存在一段字符串

JavaScript021

js 判断某字符串中是否存在一段字符串,第1张

var settime="4:00" //字符串settime

var i=settime.indexOf(':') //如果settime包含":" 则 i 返回":"在settime里面的位置,否则返回-1

<script type="text/javascript">

var n=0

function addfile(){

var where="beforeend"

var str=''//元素

var el=document.getElementById('div的id')

where = where.toLowerCase()

if(el.insertAdjacentHTML){

switch(where){

case "beforeend":

el.insertAdjacentHTML('BeforeEnd', str)

return el.lastChild

}

throw 'Illegal insertion point ->"' + where + '"'

}

var range = el.ownerDocument.createRange()

var frag

switch(where){

case "beforeend":

if(el.lastChild){

range.setStartAfter(el.lastChild)

frag = range.createContextualFragment(str)

el.appendChild(frag)

return el.lastChild

}else{

el.innerHTML = str

return el.lastChild

}

}

throw 'Illegal insertion point ->"' + where + '"'

}

</script>

我这个只是一部分,完整的可以再<div id="qwrdg"> </div>任意部分添加