JS using div elements to draw a column chart

Source: Internet
Author: User

First, JS use div elements to draw a column chart

The following function defines a column bar with a height, width, and column spacing of distance in the div with the ID chart, and a different color based on the height value, choosing the appropriate maximum width based on the width range. Adds mouse-over and move-out events to the bar, moves to the information that displays the bar, and removes the deletion information.

1 //Add a pillar2    functionAddOne (height,width,distance,value) {3     varWrap = document.getElementById ("Chart");4     vardiv = document.createelement ("div");5     //Div.setattribute ("style", "Height:" +value+ "px");6Div.setattribute ("Style", "background-color:blue;display:inline-block;margin-top:0px;margin-bottom:0; Margin-left:0 ");7div.style.height=height;8     //Set Width9     if(Width > 20) {TenDiv.style.width=20; One     } A     Else{ -Div.style.width=width; -     } thediv.style.marginright=distance; -     //Set Color -     if(Height >= 400*0.8){ -Div.style.backgroundcolor= "BLACK"; +     } -     Else if(Height >= 400*0.6 && Height < 400*0.8) { +Div.style.backgroundcolor= "Purple"; A     } at     Else if(Height >= 400*0.4 && Height < 400*0.6) { -Div.style.backgroundcolor= "Red"; -     } -     Else if(Height >= 400*0.2 && Height < 400*0.4) { -Div.style.backgroundcolor= "Blue"; -     } in     Else{ -Div.style.backgroundcolor= "Green"; to     } +Div.setattribute ("name", "chart"); -Div.setattribute ("Value", value); theDiv.onmouseover =function(){ *Document.title = Div.getattribute ("Value"); $       varDivinfo = document.createelement ("div");Panax Notoginseng       vartxt = document.createTextNode ("Time and Exponent:" +div.getattribute ("value"))); - divinfo.appendchild (TXT); thedivInfo.style.textAlign = "Center"; +DivInfo.style.color = "Red"; ADivinfo.setattribute ("id", "dateinfo"); thedivInfo.style.padding = 10; +       varChart = document.getElementById ("Chart"); - Document.body.insertBefore (divinfo,chart); $     } $Div.onmouseout =function(){ -Document.title = "Task17"; -       vardiv = document.getElementById ("Dateinfo"); the Document.body.removeChild (div); -     }Wuyi Wrap.appendchild (div); the}

Analytical:

1) Document.title to the title of the HTML assignment, title as a special node, through the getElementsByTagName ("title") [0] can get the value of the title, but can not change the value of the title.

2) Obj.onmouseover and obj.onmouseout respectively define the move-in and move-out events of the obj element;

3) Add attributes to the obj element by Obj.setattribute ("name", "value");

4) Set the style to obj by Obj.style.stylename;

JS using div elements to draw a column chart

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.