js resize div with mouse
bottom-right: new_width = element_original_width + (mouseX - original_mouseX) new_height = element_original_height + (mouseY - original_mouseY)bottom-left: new_width = element_original_width - (mouseX - original_mouseX) new_height = element_original_height + (mouseY - original_mouseY) new_x = element_original_x - (mouseX - original_mouseX)top-right: new_width = element_original_width + (mouseX - original_mouseX) new_height = element_original_height - (mouseY - original_mouseY) new_y = element_original_y + (mouseY - original_mouseY)top-left: new_width = element_original_width - (mouseX - original_mouseX) new_height = element_original_height - (mouseY - original_mouseY) new_x = element_original_x + (mouseX - original_mouseX) new_y = element_original_y + (mouseY - original_mouseY)