Idk why the developer had taken the hdnfilepath give me a proper knowledge about it.what is the use of using hiddenfeild in source page of asp.net application.
function LoadDocument(url) { debugger $("#ViewDocumentmodal").modal({ backdrop: 'static', keyboard: false},"show"); var imgFull = document.getElementById("imgFull"); var hdnfilepath = document.getElementById('<%= hdnfilepath.ClientID %>'); if (url != "" && url != null && url != "0") { imgFull.src = url; hdnfilepath.value = imgFull.src; imgFull.style.display = "block"; return false; } else { $("#ViewDocumentmodal").modal("hide"); alert("Image is not available"); } }