Move textbox around web page at runtime

The TextBox on an ASP.NET page renders as a normal HTML input, so the WinForms-style Location property is not available on the server control. @adrianSigamoney attempted a WinForms approach; layout on the Web is handled by HTML/CSS in the browser rather than a server-side Location property. @jbisono was on the right track pointing at client-side work.

A practical approach is to give the element a positioning context (for example position: absolute inside a relatively positioned container) and change its left/top values from script. When referencing an ASP.NET control from client script, use its rendered id (for example TextBox1.ClientID) or set ClientIDMode="Static" so the id is predictable.

Example client-side code:

var tb = document.getElementById('<%= TextBox1.ClientID %>');
tb.style.position = 'absolute';
tb.style.left = '150px';
tb.style.top = '200px';

Notes and gotchas: absolute positioning removes the element from normal flow, so surrounding layout can shift; prefer placing the input inside a relatively positioned wrapper to confine movement. For smooth animations, use CSS transforms (GPU-accelerated) instead of repeatedly changing left/top. If the move must be done on the server (postback), emit the appropriate inline style or CSS class from server code. See the browser guidance on CSS positioning (CSS position) and how to obtain the control id from ASP.NET (Control.ClientID).