<table width="600" border="1" align="center" style="text-align:center;">
<tr> <td width="102"><input type="checkbox" id="all"/>全選</td> <td width="203">商品</td> <td width="119">單價</td> <td width="148">數(shù)量</td> </tr> <tr> <td><input type="checkbox" id="qianbi"/></td> <td>鉛筆</td> <td>1.5元/支</td> <td><input type="text" id="qianbi_t" value="1" /></td> </tr> <tr> <td><input type="checkbox" id="yuanzhu" value="" /></td> <td>圓珠筆</td> <td>2.5元/支</td> <td><input type="text" id="yuanzhu_t" value="1" /></td> </tr> <tr> <td><input type="checkbox" id="gangbi" value="" /></td> <td>鋼筆</td> <td>3元/支</td> <td><input type="text" id="gangbi_t" value="1" /></td> </tr> <tr> <td colspan="4">金額合計：<span id="m" style="color:#F00;"></span>元 <button>提交訂單</button></td> </tr></table> var all=document.getElementById("all"); var qianbi=document.getElementById("qianbi"); var yuanzhubi=document.getElementById("yuanzhu"); var gangbi=document.getElementById("gangbi"); var qb_m=0,yzb_m=0,gb_m=0; all.onclick=function(){ if(all.checked){ qianbi.checked=true; yuanzhubi.checked=true; gangbi.checked=true; } else{ qianbi.checked=false; yuanzhubi.checked=false; gangbi.checked=false; } sub(); }; qianbi.onclick=function(){sub()}; yuanzhubi.onclick=function(){sub()}; gangbi.onclick=function(){sub()}; document.getElementById("qianbi_t").addEventListener("change",function(e){ sub(); }); document.getElementById("yuanzhu_t").addEventListener("change",function(e){ sub(); }); document.getElementById("gangbi_t").addEventListener("change",function(e){ sub(); }); function sub(){ if(qianbi.checked){ qb_m=document.getElementById("qianbi_t").value*1.5 } else{ qb_m=0; all.checked=false; } if(yuanzhubi.checked){ yzb_m=document.getElementById("yuanzhu_t").value*2.5 } else{ yzb_m=0; all.checked=false; } if(gangbi.checked){ gb_m=document.getElementById("gangbi_t").value*3 } else{ gb_m=0; all.checked=false; } var sum=qb_m+yzb_m+gb_m; document.getElementById("m").innerHTML=sum; }</script>新聞熱點
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