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新手?實(shí)現(xiàn)五星評(píng)價(jià)問(wèn)題

慕九州7009252 2016-12-08 19:45:17
<!DOCTYPE?html> <html?lang="en"> <head> ????<meta?charset="UTF-8"> ????<title>Title</title> ????<style> ?.star-off?{ ????????????height:?19px; ????????????width:?19px; ????????????display:?inline-block; ????????????background:?url("images/stare.png")?no-repeat; ????????????background-position:?-39px?0; ????????} ????????.star-on?{ ????????????height:?19px; ????????????width:?19px; ????????????display:?inline-block; ????????????background:?url("images/stare.png")?no-repeat; ????????????background-position:?-2px?0; ????????} ????</style> ????<script> ?window.onload?=?function?()?{ ????????????var?aB?=?document.getElementsByTagName('b'); ????????????for?(var?i?=?0;?i?<?aB.length;?i++)?{ ????????????????aB[i].onmouseover?=?function?()?{ ????????????????????aB[i].className?=?'star-on'; ????????????????} ????????????} ????????} ????</script> </head> <body> <div?id="commit"> ????<span>總體評(píng)價(jià):</span> ????<span?class="star"> ????????????<b?class="star-off"></b> ????????????<b?class="star-off"></b> ????????????<b?class="star-off"></b> ????????????<b?class="star-off"></b> ????????????<b?class="star-off"></b> ????????</span> ????<span?id="text"></span> </div> </body> </html>請(qǐng)問(wèn)28行為什么報(bào)錯(cuò)啊
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冥oo冥

TA貢獻(xiàn)8條經(jīng)驗(yàn) 獲得超1個(gè)贊

在function函數(shù)里不識(shí)別aB[i],改用this吧

var aB = document.getElementsByTagName('b');

? ? ? ? ? ? for (var i = 0; i < aB.length; i++) {

? ? ? ? ? ? ? ? aB[i].onmouseover = function () {

? ? ? ? ? ? ? ? ? ? this.className = 'star-on';

? ? ? ? ? ? ? ? }

? ? ? ? ? ? }

簡(jiǎn)單的說(shuō),

for(var i=0;i<10;i++){

a.onmouseover = b;

}

function b(){

//這兒不識(shí)別i

}


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