能够实进度条的拖拽功能，数字也随之变化
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style type="text/css"> .watermarkOpacity_div { width:300px; height:300px; } .proNum { padding-left:16px; } .proNum input { width:70px; height: 32px; font-size: 14px; color: #82899b; margin: 7px 10px 0 0; text-align: center; border: 1px solid #d6dae3; border-radius: 3px; } .proNum label { color:#6c748a; font-size:16px; } .watermarkOpacity_progress { background: #eaebeb none repeat scroll 0 0; border-radius: 100px; height: 6px; margin: 26px 0 0 16px; width: 245px; } .watermarkOpacity_progress p { background: #1589f4 none repeat scroll 0 0; border-radius: 100px; width:0; height: 100%; max-width: 100%; min-width: 0; position: relative; } .watermarkOpacity_progress p i { background: #fff none repeat scroll 0 0; border-radius: 50%; box-shadow: 0 0 3px 1px rgba(0, 0, 0, 0.3); cursor: pointer; height: 13px; position: absolute; right: -6px; top: -4px; width: 13px; z-index: 2; } .applicationScope_main label { color: #6c748a; cursor: pointer; font-size: 16px; height: 46px; line-height: 46px; margin-right: 60px; } .applicationScope_main label input { cursor: pointer; margin-right: 12px; } </style> </head> <body> <div class="watermarkOpacity_div"> <div class="proNum"> <input class="col-sm-8 form-control" id="opacity" value="0" type="text"><label class="perCent">%</label> </div> <div class="watermarkOpacity_progress"> <p><i></i></p> </div> </div> <script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script> <script type="text/javascript"> progress(); //进度条拖拽 function progress(){ var pro_w=$(".watermarkOpacity_progress").width(); //初始化 var per_num=$(".proNum input").val(); var new_pro=pro_w*per_num/100; $(".watermarkOpacity_progress p").css({"width":new_pro}); //改变百分比 $(".proNum input").keyup(function(){ var keyNum=$(this).val(); var key_pro=keyNum*pro_w/100; $(".watermarkOpacity_progress p").css({"width":key_pro}); }) var dragging = false; var iX,oX; $(".watermarkOpacity_progress i").mousedown(function(e){ dragging = true; iX = e.clientX - this.offsetLeft - 6; return false; }) $(".watermarkOpacity_div").mousemove(function(e){ if (dragging) { var e = e || window.event; oX = e.clientX - iX; $(".watermarkOpacity_progress p").css({"width":oX + "px"}); var per=oX/pro_w*100; if(oX<=0){ $(".proNum input").val("0"); }else if(oX>=pro_w){ $(".proNum input").val("100"); }else{ per=Math.round(per); $(".proNum input").val(per); } return false; } }) $("body").mouseup(function(e) { dragging = false; }) } </script> </body> </html>